After playing a day with it, I must say that it works verry good and stable.

I have 1 Rig that didn't run on 2.9e only on 2.7c because of crashes.
And even this headache Rig is now running steady with an hashrate of 194.2 in stead of 191.5
I increased the memory clock of all 12 GPU's (GTX 1070) with +/- 3-5%.

Total hashrate of 385 is now 390.5!

So, I am happy with this version.